Tips:Create an Informat from a User-Defined Function

Did you know that in SAS version 9.3, you can create your own INFORMAT (or FORMAT) from a user-defined function?
You can use this capability to write an INFORMAT that will perform a task that might have required data step programming such as convert a fraction to a decimal value or convert a Fahrenheit temperature to Centigrade (or vice-versa)